$($Mandatory$)$ Write a program that calculates the

equivalent resistance of a network of series or parallel

resistors. The program should prompt for the following

input:

parallel or series calculation?

loop for the number of elements $($either enter the

number of resistors, or terminate the value$-$entering

loop with a sentinel value...if you insist.$)$

the value of each resistor

After calculating the equivalent resistance, the program

should output this value.

Make use of one or more of the following control

statements:

$\text{'}$if$/$else$\text{'}$ statement

'while' loop

Parallel: $R_{\text{g}\text{a}\text{v}\text{i}\text{v}\text{a}\text{l}\text{e}\text{n}\text{t}}=\frac{1}{\frac{1}{R}+\frac{1}{R_2}+3+\frac{1}{R_v}},$ and

resisters.